Change VariantType to workaround compiler issue

[jyapayne]

Workaround for: nim-lang/Nim#16462.

It doesn't hurt to change these since it's an internal enum. This makes this repo work with the latest Nim devel.

[endragor]

Thanks for the PR, but the enum is not private - it's re-exported from variants.nim.

And even without that godotinternal module is a part of the public API. It just separates stuff that you should use only when you know what you are doing. But there are useful application use cases for it.

[jyapayne]

Ah, I see. Alright, guess it's better to wait for the compiler to be fixed.

[jyapayne]

@endragor actually, this can be worked around by moving the template below importing of the arrays module. Do you mind if template definePoolArray is moved below import arrays in godot/core/poolarrays.nim?